Heavy door

Abstract

This heavy door 1 includes a door frame provided in an opening Wa formed in a wall body W, and a door body 2 capable of opening and closing the opening Wa. The door body 2 can be displaced between an open state in which the door body is separated from the opening Wa, a closed state in which the door body approaches the opening Wa to form a gap with the door frame, and a sealed state in which the door body abuts the door frame to seal the opening Wa. The door body further includes a support structure that causes the door body 2 to be displaced between the open state and the closed state. The support structure includes a slide displacement mechanism that allows the door body 2 to approach and separate from the door frame between the closed state and the sealed state.

Description

Heavy Door

[0001] This disclosure relates to heavy doors that require tight sealing.

[0002] BACKGROUND ART Heavy doors having airtightness have been known in the past (see, for example, Patent Document 1).

[0003] Japanese Patent Application Laid-Open No. 2023-110465

[0004] According to the configuration described in Patent Document 1, the door body rotates while approaching the door frame, which can make it difficult to achieve a smooth seal between the door body and the door frame and can also make the door less maneuverable. Therefore, an object of the present disclosure is to solve the above-mentioned problems.

[0005] A heavy door according to a first aspect of the present invention is a heavy door comprising a door frame provided in an opening formed in a wall, and a door body that can open and close the opening, wherein the door body is displaceable between an open state in which it is away from the opening, a closed state in which it is close to the opening and a gap is formed between the door frame, and a sealed state in which it abuts against the door frame to seal the opening, and further comprising a support structure that displaces the door body between the open state and the closed state, and the support structure comprises a sliding displacement mechanism that allows the door body to move towards and away from the door frame between the closed state and the sealed state.

[0006] According to the heavy door of the first aspect, by bringing the door body close to the door frame while maintaining a parallel posture to the door frame, the timing of contact between the door body and the door frame can be synchronized, thereby smoothly sealing the door body and the door frame and improving operability.

[0007] A heavy door according to a second aspect of the present invention is the heavy door according to the first aspect, further comprising a packing interposed between the door frame and the door body.

[0008] According to the heavy door of the second aspect, the timing of contact between the packing and the mating side can be synchronized, thereby suppressing friction between the packing and the mating side.

[0009] In the heavy door according to the second aspect, the packing can be provided on either or both of the door frame and the door body.

[0010] A heavy door according to a third aspect of the present invention is the heavy door according to the second aspect, wherein the support structure comprises a hinge that pivotally displaces the door body between the open state and the closed state, and the sliding displacement mechanism is provided on the hinge.

[0011] According to the heavy door relating to the third aspect described above, even in the case of a door body that is a hinged door, the timing of contact between the gasket and the opposing side can be synchronized, thereby suppressing the occurrence of friction between the gasket and the opposing side.

[0012] A heavy door according to a fourth aspect of the present invention is the heavy door according to the second aspect, wherein the support structure comprises a slide support part that slides and displaces the door body in a direction perpendicular to the thickness direction of the door body between the open state and the closed state, and the slide displacement mechanism is provided on the slide support part.

[0013] According to the heavy door relating to the fourth aspect described above, even in the case of a door body that slides, the timing of contact between the gasket and the opposing side can be synchronized, thereby suppressing the occurrence of friction between the gasket and the opposing side.

[0014] In the heavy door according to the fourth aspect, the direction of the sliding displacement by the sliding support portion may be either vertical or horizontal.

[0015] A heavy door according to a fifth aspect of the present invention is the heavy door according to the third or fourth aspect, further comprising a pressing means for pressing the door body in a direction in which the door body changes from the closed state to the sealed state.

[0016] According to the heavy door according to the fifth aspect, the heavy door can be maintained in a sealed state.

[0017] A heavy door according to a sixth aspect of the present invention is a heavy door according to the fifth aspect, wherein the pressing means comprises a rod that can move forward and backward from the door body and a pressing pin fixed to the door frame, and the rod extends toward the door frame, and an inclined surface formed at the tip of the rod abuts against the pressing pin, thereby pressing the door body in the direction from the closed state to the sealed state.

[0018] According to the heavy door according to the sixth aspect, the door body can be sealed with a simple structure.

[0019] A heavy door according to a seventh aspect of the present invention is the heavy door according to the sixth aspect, wherein the slide displacement mechanism includes a biasing means for biasing the door body in a direction toward the closed state.

[0020] According to the heavy door according to the seventh aspect, the door body can be separated from the door frame when the pressing force from the pressing means is released.

[0021] A heavy door according to an eighth aspect of the present invention is a heavy door comprising a door frame provided in an opening formed in a wall, and a door body that can open and close the opening, wherein the door body is displaceable between an open state in which it is away from the opening, and a sealed state in which it abuts against the door frame to seal the opening, and further comprises a pressing means that presses the door body against the door frame, and the pressing means has a handle that is rotatable with its axial direction facing perpendicular to the door body, a pinion gear that is integral with the rotation axis of the handle, and a rack that is capable of moving back and forth by meshing with the pinion gear, and the door body is pressed against the door frame by displacing the rack by operating the handle.

[0022] According to the heavy door of the eighth aspect, by configuring the pressing means using a pinion gear whose axis direction is perpendicular to the surface of the door body, the dimension of the door body in the thickness direction can be made compact.

[0023] A heavy door according to a ninth aspect of the present invention is the heavy door according to the eighth aspect, wherein the pressing means has a rod that can move forward and backward from the door body and a pressing pin fixed to the door frame, and the rod is extended toward the door frame by displacement of the rack, and an inclined surface formed at the tip of the rod abuts against the pressing pin, thereby pressing the door body in the direction of the sealed state.

[0024] According to the heavy door according to the ninth aspect, the door body can be sealed with a simple structure.

[0025] A heavy door according to a tenth aspect of the present invention is the heavy door according to the ninth aspect, wherein the pressure pins are provided on both the left and right sides of the door frame, the rack comprises an upper rack arranged above the pinion gear and a lower rack arranged below the pinion gear, and the rod comprises one rod extended by displacement of the upper rack and the other rod extended by displacement of the lower rack, and the one rod and the other rod abut against the left and right pressure pins, respectively.

[0026] According to the heavy door according to the tenth aspect, the pressing force by the pressing means can be applied equally to the left and right of the door body.

[0027] A heavy door according to an eleventh aspect of the present invention is a heavy door according to the tenth aspect, wherein the pressure pins are provided on the upper and lower sides of both the left and right sides of the door frame, the upper rack and the lower rack are each provided with a connecting member having a longitudinal direction in the up-and-down direction, the one rod and the other rod are provided on the upper and lower sides of the connecting member, and the one rod and the other rod abut against the pressure pins on the upper and lower sides on both the left and right sides.

[0028] According to the heavy door according to the eleventh aspect, the pressing force of the pressing means can be applied equally to the top and bottom of the door body.

[0029] A heavy door according to a twelfth aspect of the present invention is the heavy door according to the eleventh aspect, further comprising a guide member for guiding horizontal displacement of the connecting member.

[0030] According to the heavy door according to the twelfth aspect, the connecting member can be displaced stably.

[0031] A heavy door according to a thirteenth aspect of the present invention is a heavy door according to the twelfth aspect, wherein a roller is provided at the lower end of the connecting member, and the roller is capable of rolling on the upper surface of a support member provided inside the door body.

[0032] According to the heavy door according to the thirteenth aspect, the connecting member can be displaced more stably.

[0033] 11 is a front view showing a heavy door according to the present embodiment; a perspective view showing the internal structure of the door body; (a) and (b) are plan views showing the door body in the closed state and the open state, respectively; a plan cross-sectional view showing the door body in the closed state; a cross-sectional view along line A-A in FIG. 4; a cross-sectional view showing the door body in the sealed state; a cross-sectional view along line B-B in FIG. 6; (a) is a plan view showing the shape of the rod, and (b) to (d) are plan views showing the magnitude of the reaction force that the rod receives from the pressure pin; a front view showing the configuration of the hinge; (a) and (b) are cross-sectional views along line C-C in FIG. 9 showing the door body in the closed state and the sealed state, respectively; (a) and (b) are front views showing the handle regulating part of the door body in the closed state and the open state, respectively; a cross-sectional view along line D-D in FIG. 11; (a) and (b) are front views showing the arrangement of the regulating member, and a plan view of the regulating member when the door body is in the open state, respectively. 10A and 10B are a front view showing an arrangement configuration according to a modified example of the regulating member, and a plan view of the regulating member when the door body is in an open state, respectively.

[0034] [Heavy Door 1] First, the overall configuration of a heavy door 1 according to one embodiment of the present invention will be described with reference to the drawings. In this embodiment, the front side of the page shown in Fig. 1 is the front of the heavy door 1, and the rear side of the page is the rear of the heavy door 1. Also, the right side (the tail end side of the door body 2) shown in Fig. 1 is the right side of the heavy door 1, and the left side (the leading end side of the door body 2) is the left side of the heavy door 1.

[0035] The heavy door 1 in this embodiment is composed of a door frame (tail frame 4, front frame 5, upper frame 6, and lower frame 7) provided along an opening Wa (see FIG. 3) formed in a wall W, and a door body 2 connected to the door frame (tail frame 4) via two hinges 3, 3. A handle 8 and a handle 9 are provided on the front and rear surfaces of the door body 2, respectively.

[0036] In the heavy door 1 according to this embodiment, the door body 2 is movable between an open state in which it is spaced apart from the opening Wa as shown in FIG. 3(b), a closed state in which it is close to the opening Wa and a gap is formed between it and the door frame as shown in FIGS. 3(a) and 4, and a sealed state in which it abuts against the door frame and seals the opening Wa as shown in FIG.

[0037] 4 and 6, in the heavy door 1 according to this embodiment, a protrusion 21c is provided on the peripheral edge of the rear surface of the door body 2 (the rear surface of the door main body 21 described later), and a packing P is installed on the outer periphery of the door frame. As a result, when the door body 2 is fastened to the door frame in a sealed state, the protrusion 21c is pressed against the packing P, sealing the gap between the door body 2 and the door frame. In this way, the packing P is used to seal the gap between the door body 2 and the door frame when the door body 2 approaches the door frame.

[0038] In this embodiment, the packing P is provided on the door frame, but it is also possible to provide the packing P on the door body 2, or to provide the packing P on both the door body 2 and the door frame. It is also possible to provide no packing P, or to provide double packing P.

[0039] [Door body 2] In the heavy door 1 according to this embodiment, the door body 2 is configured to include a door main body 21 and a door insertion portion 25 that protrudes to the rear side of the door main body 21, as shown in Fig. 3. The rear surface of the door main body 21 abuts against the door frame to seal the opening Wa. The door insertion portion 25 is formed with dimensions slightly smaller than the door main body 21, and is inserted into the door frame as shown in Fig. 3(a).

[0040] As shown in Figure 2, the door body 21 of the door element 2 has an opening formed on the left side (front side) that communicates with the internal space. A plurality of blocks 23, 23... are inserted vertically into the internal space of the door body 21. Each block 23 has a radiation shielding function and can be inserted into the internal space from the opening of the door body 21. These blocks 23, 23... configure the heavy door 1 according to this embodiment as a radiation-shielding door.

[0041] In the heavy door 1 according to this embodiment, even after the door body 2 has been assembled to the door frame and installed, the radiation shielding function can be changed by changing the type of block 23. The material of the block 23 can be concrete, polyethylene, mortar, palladium, etc.

[0042] In this embodiment, the opening surface of the door body 21 is formed on the door leading side of the door element 2. As a result, even after the door element 2 has been installed by being assembled to the door frame, it is not necessary to remove the door element 2 from the hinge 3 when replacing the block 23. In other words, the block 23 can be easily replaced after the heavy door 1 has been installed.

[0043] 2, the interior space of the door body 21 is divided into a plurality of insertion sections vertically by block guides 21a, and the blocks 23 can be inserted into each of the insertion sections from their openings. This allows the plurality of blocks 23 to be smoothly inserted into the interior space of the door body 21.

[0044] In this embodiment, each block 23 is formed in a rectangular column shape, but the blocks 23 may have other shapes. For example, it is possible to form an engaging portion on the top surface of a block 23 that engages with another block 23 above, and an engaged portion on the bottom surface of the block 23 that engages with another block 23 below. This allows the engaging portion to close the gap between the blocks 23, thereby preventing radiation from leaking from the gap between the blocks 23.

[0045] A cover member 22 that covers the opening is provided on the left side of the door body 21. In the heavy door 1 according to this embodiment, by covering the opening of the door body 21 with the cover member 22, it is possible to stably hold the multiple blocks 23, 23...

[0046] As shown in Figure 2, in the heavy door 1 according to this embodiment, each block 23 can be provided with a handle 24 on the opening side, which makes it possible to easily replace the block 23.

[0047] In this embodiment, a female threaded portion 23a is formed on the block 23. A male threaded portion (not shown) is formed on the handle 24. The male threaded portion of the handle 24 is screwed into the female threaded portion 23a, thereby assembling the handle 24 to the block 23. By making the handle 24 detachable from the block 23 in this way, it is possible to eliminate the need for space for the handle 24 inside the door main body 21.

[0048] [Hinge 3] As shown in Fig. 1, the heavy door 1 according to this embodiment is provided with a pair of upper and lower hinges 3, 3 as a support structure for pivotally displacing the door body 2 between the open state and the closed state. In this embodiment, the upper hinge 3 and the lower hinge 3 are configured in substantially the same manner with vertical symmetry. Below, the upper hinge 3 will be described, and a detailed description of the lower hinge 3 will be omitted.

[0049] 1 and 9, the hinge 3 is configured to include a fixed hinge 31, a movable hinge 32, and a pivot shaft 33. In the hinge 3, the fixed hinge 31 fixed to the door end frame 4 and the movable hinge 32 attached to the door body 2 are connected via the pivot shaft 33 so as to be relatively rotatable. As a result, the door body 2 is attached to the door frame via the hinge 3 so as to be relatively rotatable.

[0050] In the heavy door 1 according to this embodiment, the hinge 3 is provided with a sliding displacement mechanism that enables the door body 2 to move closer to or farther from the door frame between the closed state and the sealed state, and includes a hinge side support portion 34, a door side support portion 35, a guide member 36, a guide holding portion 37, and a hinge spring 38.

[0051] In the sliding displacement mechanism, the hinge-side support part 34 is fixed to the movable hinge 32, and the door-side support part 35 is fixed to the door main body part 21 of the door body 2. The hinge-side support part 34 and the door-side support part 35 are connected by a guide member 36 so as to be able to slide and displace in the front-rear direction (thickness direction of the door body 2).

[0052] The guide member 36 is composed of a fixed guide 36a and a movable guide 36b, which are engaged via a bearing (not shown) to enable smooth relative sliding displacement. The fixed guide 36a is fixed to the hinge-side support part 34, and the movable guide 36b is fixed to the door-side support part 35 via a guide holder 37.

[0053] 10, two restriction pieces 34a, 34a are formed on both the front and rear ends of the hinge-side support part 34 toward the door-side support part 35. The restriction pieces 34a, 34a restrict the sliding range of the movable guide 36b.

[0054] As described above, in the heavy door 1 according to this embodiment, the sliding displacement mechanism allows the door body 2 to approach the door frame while maintaining a parallel posture with respect to the door frame. This allows the timing of the door body 2 and the door frame to be synchronized, allowing the door body 2 and the door frame to be smoothly sealed, improving operability.

[0055] Furthermore, in this embodiment, the slide displacement mechanism can synchronize the timing of contact between the packing P and the mating protrusion 21c, thereby suppressing friction between the packing P and the protrusion 21c.

[0056] In the heavy door 1 according to this embodiment, the sliding displacement mechanism includes two compression hinge springs 38, 38 as biasing means for biasing the door body 2 in the direction of closing. As shown in Fig. 10(a), the hinge spring 38 is interposed between a spring receiving portion 34b that protrudes from the hinge-side support portion 34 toward the door-side support portion 35, and a compression portion 35a that protrudes from the door-side support portion 35 toward the hinge-side support portion 34.

[0057] With the above-described configuration, the door-side support portion 35 and the door body 2 are always biased by an elastic force toward the front. In other words, the door body 2 is biased in a direction away from the door frame by the elastic force of the hinge spring 38. Even if the door body 2 is displaced rearward and the hinge spring 38 is compressed as shown in Fig. 10(b), the elastic force of the hinge spring 38 causes the door body 2 to return to the front position as shown in Fig. 10(a). In this way, in this embodiment, the door body 2 is biased in a direction away from the door frame.

[0058] In this embodiment, the hinge 3 is configured to include a sliding displacement mechanism that allows the door body 2 to move toward or away from the door frame between the closed state and the sealed state, but the sliding displacement mechanism can also be used in configurations other than hinged doors. For example, the heavy door 1 may be configured to include a sliding support part that slides the door body 2 in a direction perpendicular to the thickness direction of the door body 2 (left-right or up-down direction) between the open state and the closed state, and the sliding displacement mechanism may be provided on this sliding support part. In other words, the heavy door 1 may be configured to include a sliding displacement mechanism as a sliding door.

[0059] Even when the heavy door 1 is configured as a sliding door as described above, the sliding displacement mechanism allows the door body 2 to approach the door frame while maintaining a parallel posture with respect to the door frame. This allows the timing of the door body 2 and the door frame to be synchronized, allowing the door body 2 and the door frame to be smoothly sealed, improving operability.

[0060] 4 and 5 , the pressing means includes a handle 9, a shaft member 41, a pinion gear 43, racks (upper rack 44 a and lower rack 44 b), a first connecting member 45 a, a second connecting member 45 b, a rod 50, and a pressing pin 53.

[0061] 4, in the heavy door 1, the handles 9, 9 provided on both sides of the door body 2 are connected by a shaft member 41 that penetrates the door body 2 so as not to be displaced relative to each other. The shaft member 41 is supported by a shaft holder 42 fixed to the rear surface of the door main body 21. In other words, the handles 9, 9 are provided so as to be rotatable in a direction perpendicular to the door body 2, with the axial direction of the shaft member 41, which is the rotation axis, facing in the direction.

[0062] 5, a pinion gear 43 is integrally provided on the shaft member 41 in the internal space of the door insertion portion 25. An upper rack 44a that meshes with the pinion gear 43 is provided above the pinion gear 43, and a lower rack 44b that meshes with the pinion gear 43 is provided below the pinion gear 43. The upper rack 44a and the lower rack 44b are arranged with their longitudinal directions facing left and right.

[0063] Rack guides 46 equipped with rack rollers 46a are disposed above the upper rack 44a and below the lower rack 44b. That is, the upper rack 44a and the lower rack 44b are sandwiched between the pinion gear 43 and the rack guide 46 from above and below, and are therefore movable back and forth in the left and right directions by rotation of the pinion gear 43. In this embodiment, as shown in Fig. 7, the upper rack 44a is arranged to advance to the left (the leading edge side of the door body 2), and the lower rack 44b is arranged to advance to the right (the trailing edge side of the door body 2).

[0064] 7, the center of a first connecting member 45a, which is a rod-shaped member with its longitudinal direction oriented vertically, is fixed to the left end of the upper rack 44a, and the center of a second connecting member 45b, which is a rod-shaped member with its longitudinal direction oriented vertically, is fixed to the right end of the lower rack 44b.

[0065] The first connecting member 45a has first guided portions 45c with guide grooves formed in two locations, one above and one below. Similarly, the second connecting member 45b has second guided portions 45d with guide grooves formed in two locations, one above and one below. The first guided portions 45c and the second guided portions 45d are guided in their sliding movement in the left-right direction by a connecting guide 47, which is a guide member equipped with a connecting roller 47a. In this way, in this embodiment, the connecting guide 47 enables the first connecting member 45a and the second connecting member 45b to be slidably moved in the left-right direction.

[0066] A first roller 45e is provided at the lower end of the first connecting member 45a. Similarly, a second roller 45f is provided at the lower end of the second connecting member 45b. The first roller 45e and the second roller 45f are capable of rolling on the upper surface of a support member 48 provided inside the door insertion portion 25 of the door body 2. In this manner, in this embodiment, by allowing the first roller 45e and the second roller 45f to roll on the upper surface of the support member 48, the first connecting member 45a and the second connecting member 45b can be slid and displaced in the left-right direction more stably.

[0067] As shown in Figure 5, two rods 50, 50 extending leftward are fixed to the upper and lower ends of the first connecting member 45a. Similarly, two rods 50, 50 extending rightward are fixed to the upper and lower ends of the second connecting member 45b. An inclined surface 50a facing forward and outward is formed at the tip of each rod 50.

[0068] Each rod 50 is supported by being inserted into a rod guide 51. When the first connecting member 45a and the second connecting member 45b slide in the left-right direction, the four rods 50 slide inside the rod guides 51 and can extend outward in the left-right direction from the door insertion portion 25.

[0069] 4 and 5, pressure pins 53 supported by pin support portions 52 are fixed to the door frame (end frame 4 and front frame 5) of the heavy door 1 according to this embodiment at four positions facing the respective rods 50. When each rod 50 is extended outward in the left-right direction from the door insertion portion 25, the inclined surfaces 50a of the rods 50 come into contact with the pressure pins 53, as shown in FIGS.

[0070] In the pressing means configured as described above, when a user rotates the handle 9 counterclockwise in Fig. 5, the handle 9 rotates the pinion gear 43, causing the upper rack 44a and the lower rack 44b to slide outward in the left-right direction, as shown in Fig. 7. This causes the first connecting member 45a and the second connecting member 45b to slide outward, and the four rods 50 extend outward in the left-right direction from the door insertion portion 25.

[0071] 6, the inclined surface 50a comes into contact with the pressing pins 53 fixed inside the end frame 4 and the front frame 5, respectively, and the door body 2 is pressed backward (towards the door frame). In this way, in this embodiment, the pressing means housed inside the door body 2 displaces the upper rack 44a and the lower rack 44b by operating the handle 9, and the door body 2 is pressed against the door frame. That is, in the heavy door 1, the pressing means brings the door body 2 into close contact with the door frame, changing from a closed state to a sealed state.

[0072] Furthermore, in the heavy door 1, the rod 50 is extended toward the door frame due to the displacement of the upper rack 44a and the lower rack 44b, and the inclined surface 50a formed at the tip of the rod 50 abuts against the pressing pin 53, thereby pressing the door body 2 in the direction toward the sealed state. In this way, in this embodiment, the door body 2 can be sealed with a simple structure.

[0073] In addition, in the heavy door 1, pressure pins 53 are provided on both the left and right sides of the door frame, and the rack is configured to include an upper rack 44a located above the pinion gear 43 and a lower rack 44b located below the pinion gear 43. The rods 50 include one rod 50 that extends leftward due to displacement of the upper rack 44a, and the other rod 50 that extends rightward due to displacement of the lower rack 44b. The one and other rods 50 are configured to abut against the left and right pressure pins 53, respectively. In this way, it is possible to apply a pressure force from the pressing means to the door body 2 equally on the left and right.

[0074] Furthermore, in the heavy door 1, pressure pins 53 are provided on the upper and lower sides of both the left and right sides of the door frame, and the upper rack 44a and the lower rack 44b are provided with first and second connecting members 45a and 45b, respectively, whose longitudinal directions are in the up-down direction. Furthermore, the left and right rods 50 are provided above and below the first and second connecting members 45a and 45b, respectively. The left and right rods 50 are configured to abut against the upper and lower pressure pins 53 on both the left and right sides. This makes it possible to apply pressure from the pressing means to the door body 2 evenly above and below.

[0075] 8(a), the inclined surface 50a formed on the rod 50 is formed with a first surface C1 formed on the tip side of the rod 50 and a second surface C2 formed continuously with the first surface C1. In a plan view (a cross-sectional view passing through the axis of the rod 50), the cutting line between the first surface C1 and the second surface C2 forms an arc. In addition, the radius of curvature R1 of the first surface C1 (the distance between the first surface C1 and the first imaginary center O1) is smaller than the radius of curvature R2 of the second surface C2 (the distance between the second surface C2 and the second imaginary center O2).

[0076] By forming the inclined surface 50a of the rod 50 in the above-described shape, the angle formed by the tangent line between the inclined surface 50a and the pressing pin 53 and the axis of the rod 50 becomes smaller as the rod 50 is extended. Specifically, as shown in Figures 8(b) to 8(d), the angle formed by the tangent line between the inclined surface 50a and the pressing pin 53 and the axis of the rod 50 is as follows: angle α1 in Figure 8(b) > angle α2 in Figure 8(c) > angle α3 in Figure 8(d).

[0077] 8(b) to 8(d), even if the reaction force F received from the pressing pin 53 increases (F1 < F2 < F3) as the rod 50 is extended, it is possible to reduce the change in the magnitude of the component forces Fa1, Fa2, and Fa3 resolved in the axial direction of the rod 50. In this way, even if the reaction force received from the pressing pin 53 increases as the extension length of the rod 50 increases, it is possible to suppress an increase in the force required to operate the handle 9 (the reaction force received in the axial direction of the rod 50). In other words, even if the reaction force received by the rod 50 from the pressing pin 53 increases, the handle 9 can be operated smoothly.

[0078] 5, 11, and 12, the heavy door 1 according to this embodiment includes a handle regulating portion 60 that regulates the operation of the handle 9 when the door body 2 is in the open state. As shown in Fig. 11, the handle regulating portion 60 includes a regulating member 61, a regulating protrusion 62, a regulated portion 63, a release pin 65, etc.

[0079] In the handle restricting portion 60, the restricting member 61 is a plate-shaped member that restricts the operation of the handle 9. A lower left side of the restricting member 61 is rotatably supported on the door main body 21 by a rotation shaft 61a. The restricting member 61 is rotatably displaceable up and down between a lower restricting position that restricts the operation of the handle 9 as shown in Fig. 11(b) and an upper release position that releases the restriction on the operation of the handle 9 as shown in Fig. 11(a). An elongated hole 61b is opened above the rotation shaft 61a in the restricting member 61.

[0080] A downwardly projecting restricting protrusion 62 is fixed to the right end of the restricting member 61. As shown in Figures 11(b) and 12, a restricted portion 63 that supports the restricting member 61 when the restricting member 61 is in the restricting position is fixed to the rear surface of the second connecting member 45b.

[0081] As shown in Figure 11(b), when the restricting member 61 is in the restricting position, the restricting protrusion 62 restricts the restricted portion 63 from moving to the right. That is, the sliding movement of the second connecting member 45b to the right and the operation of the handle are restricted. As shown in Figure 11(a), when the restricting member 61 is in the released position, the restricting protrusion 62 retracts upward, so the rightward displacement of the restricted portion 63 is not restricted. That is, the sliding movement of the second connecting member 45b to the right and the operation of the handle are possible.

[0082] In the handle restricting portion 60, the release pin 65 is a rod-shaped member that releases the restriction imposed by the restricting member 61. The release pin 65 is supported by the pin holding portions 64, 64 so as to be able to slide in the left-right direction while extending to the right from the door insertion portion 25 of the door body 2. A tip portion 65a is provided at the right end of the release pin 65, and an engagement rod 65b that protrudes rearward is provided at the left end (see FIG. 12).

[0083] As shown in Figure 12, the engagement rod 65b of the release pin 65 is inserted into the elongated hole 61b of the regulating member 61. When the release pin 65 is located on the left side as shown in Figure 11(a), the regulating member 61 is rotated counterclockwise by the release pin 65 to the released position. When the release pin 65 is located on the right side as shown in Figure 11(b), the regulating member 61 is rotated clockwise by the release pin 65 to the regulating position.

[0084] In the heavy door 1 according to this embodiment, as shown in Fig. 11(a) , when the door body 2 is closed, the release pin 65 of the handle restricting portion 60 is pressed into the door insertion portion 25 by the door frame (end frame 4), causing the restricting member 61 to be displaced to the release position. On the other hand, as shown in Fig. 11(b) , when the door body 2 is open, the restricting member 61 is displaced to the restricting position by its own weight, causing the release pin 65 to extend outside the door insertion portion 25.

[0085] As described above, in the heavy door 1 according to this embodiment, when the door body 2 is in the open state, the handle regulating section 60 is not released by the release pin 65, and is configured to regulate the operation of the handle 9. This makes it possible to suppress the extension of the rod 50 when the door body 2 is in the open state, thereby preventing the extended rod 50 from colliding with the door frame when the door body 2 is in the open state and damaging the rod 50.

[0086] In this embodiment, the release pin 65 of the handle restricting portion 60 is disposed so as to extend toward the pivot center (the trailing edge side) of the door body 2. As a result, by rotating the door body 2 from the open state to the closed state, the release pin 65 is pressed by the trailing edge frame 4, and the restriction by the restricting member 61 can be released.

[0087] In addition, in this embodiment, the regulating member 61 of the handle regulating unit 60 is configured to regulate the displacement of the second connecting member 45b to the right, thereby regulating the displacement of the lower rack 44b and regulating the operation of the handle 9. In this way, by regulating the operation of the pressing means using the pinion gear 43, whose axial direction is perpendicular to the surface of the door body 2, with the regulating member 61, it is possible to make the dimension of the handle regulating unit 60 in the thickness direction compact.

[0088] 3 and 13, the heavy door 1 according to this embodiment is provided with a door restricting section 70 for restricting the opening angle of the door body 2 from the door frame when the door body 2 is in the open state. The door restricting section 70 is configured to include a shaft section 71, a restricting member 72, a restricting roller 73, and a buffer member 74. It is also possible to provide the restricting member 72 on the door frame.

[0089] 13A, the restricting member 72 of the door restricting portion 70 is interposed between the upper surface of the door insertion portion 25 of the door body 2 and the door frame (upper frame 6). The base end of the restricting member 72 is rotatably supported by the upper frame 6 via a shaft portion 71.

[0090] A restricting roller 73 is provided at the tip of the restricting member 72. The restricting roller 73 is inserted into a rail 25a provided on the upper surface of the door insertion portion 25. The restricting roller 73 is able to roll inside the rail 25a, allowing the door body 2 to be opened and closed smoothly.

[0091] The rail 25a of the heavy door 1 according to this embodiment is provided with a buffer member 74 against which the regulating roller 73 abuts when the door body 2 is in the open state. The buffer member 74 includes a main body portion 74a fixed to the rail 25a, a contact portion 74b that abuts against the regulating roller 73, and a compression spring 74c interposed between the main body portion 74a and the contact portion 74b.

[0092] According to the heavy door 1 of this embodiment, when the door body 2 is in the open state, the shock applied to the restricting member 72 can be absorbed by the buffer member 74, as shown in Fig. 13(b). Therefore, it is possible to suppress damage to the restricting member 72.

[0093] 13B, in this embodiment, the contact surface of the contact portion 74b that comes into contact with the regulating roller 73 is formed in a concave shape that conforms to the outer shape of the regulating roller 73. This makes it possible to improve the shock absorption properties when the regulating roller 73 comes into contact with the buffer member 74.

[0094] 14(a) and 14(b), the buffer member 74 in the door regulating unit 70 according to this embodiment has a variable position within the rail 25a in the longitudinal direction of the rail 25a (the fixed position of the main body 74a). As a result, the opening angle of the door body 2 caused by the regulating member 72 is changed depending on the position of the buffer member 74. Specifically, as shown in FIGS. 14(a) and 14(b), the opening angle of the door body 2 is reduced by displacing the position of the main body 74a toward the door end of the door body 2 compared to FIGS. 13(a) and 13(b). In this way, according to this embodiment, the opening angle of the door body 2 can be easily adjusted by adjusting the position of the buffer member 74.

[0095] [Modifications] The above embodiment can be modified as appropriate as shown in the following modifications. Each modification may be applied in combination with other modifications as long as no contradiction occurs.

[0096] In this embodiment, the hinge 3, which is a support structure for displacing the door body 2 between the open state and the closed state, is provided on the door frame, but the support structure may be provided in a location other than the door frame. For example, the hinge 3 may be attached to the wall W.

[0097] It is also possible for the heavy door 1 to be configured without the packing P. Even if the packing P is provided, it is also possible to provide the packing P in the door body 2, or in both the door body 2 and the door frame.

[0098] It is also possible to configure the heavy door 1 without providing a pressing means. Even if a pressing means is provided, a configuration other than a rod and a pressing pin can be adopted as long as the door body 2 can be brought into close contact with the door frame. It is also possible to configure the slide displacement mechanism without providing a biasing means.

[0099] In addition, although the pressing means for tightly contacting the door body 2 with the door frame is provided on the door body 2, it is also possible to provide the pressing means at a location other than the door body 2. For example, it is also acceptable to apply a force from the outside to the door body 2 to tightly contact the door frame. Furthermore, as long as the door body 2 can be tightly contacted with the door frame, a configuration other than the rod 50 and pressing pin 53 can be used as the pressing means.

[0100] In the heavy door 1, the locations and numbers of the rods 50 and the pressure pins 53 can be configured differently. For example, it is possible to adopt a configuration in which they are arranged in the vertical direction in addition to the left-right direction of the door body 2, or a configuration in which they are arranged in the vertical direction instead of the left-right direction of the door body 2. Furthermore, it is also possible to configure the heavy door 1 without providing a guide member for guiding the displacement of the connecting member or a roller at the lower end of the connecting member.

[0101] In this embodiment, the material of the block 23 used in the heavy door 1 can be concrete, polyethylene, mortar, palladium, etc. The shape of the block 23 can also be a shape other than a rectangular pillar. A single block 23 can also be made by combining multiple types of materials.

[0102] The heavy door 1 may be configured not to have a plurality of divided insertion portions formed in the internal space of the door body 2. In other words, the blocks 23 may be stacked vertically in one internal space, and the blocks 23 may be inserted into the door body 2.

[0103] The heavy door 1 may be configured without the cover member 22 that shields the opening surface of the door body 2. It is also possible to provide the opening surface on another surface of the door body 2 (for example, the top surface or the rear surface).

[0104] The heavy door 1 may be configured so that the block 23 does not have a handle 24. Alternatively, the handle 24 of the block 23 may be configured to be non-detachable, or may be configured to be detachable by means other than screws, or may have a recess in the block 23 as the handle 24.

[0105] In this embodiment, the hinge 3, which is a support structure for displacing the door body 2 between the open state and the closed state, is provided on the door frame, but the support structure may be provided in a location other than the door frame. For example, the hinge 3 may be attached to the wall W.

[0106] Furthermore, the restricting member 72 may be attached to a location other than the door frame in the door restricting portion 70. For example, the restricting member 72 may be attached to the wall W.

[0107] It is also possible to configure the door regulating section 70 so that the position of the buffer member 74 is not variable. It is also possible to configure the buffer member 74 without a compression spring. The contact portion 74b of the buffer member 74 may have a different shape. It is also possible to configure the regulating member 72 so that the regulating roller 73 is not provided at the tip thereof.

[0108] In this embodiment, the shape of the inclined surface 50a of the rod 50 is not limited to this embodiment. For example, the inclined surface 50a may be a single arc shape or a combination of three or more arc shapes. Furthermore, even when multiple arc shapes are combined, the magnitude of their radii of curvature may be changed as appropriate, or they may be interchanged.

[0109] In the heavy door 1, the positions and numbers of the rods 50 and the pressing pins 53 can be configured differently. For example, a configuration in which the rods 50 and the pressing pins 53 are arranged in the vertical direction in addition to the horizontal direction of the door body 2, or a configuration in which the rods 50 and the pressing pins 53 are arranged in the vertical direction instead of the horizontal direction of the door body 2 can be adopted.

[0110] In the heavy door 1, the handle regulating unit 60 may be configured not to include the release pin 65. For example, a configuration may be adopted in which a protrusion is formed on the door frame, and the handle regulating unit regulates the operation of the handle 9 by inserting this protrusion into the door body 2. Furthermore, when the handle regulating unit 60 is provided with the release pin 65, the release pin 65 may be extended rearward to abut against the door frame.

[0111] In the heavy door 1, the restricting member 61 of the handle restricting unit 60 is not limited to a specific location as long as it restricts the displacement of any location of the pressing means that extends the rod 50. For example, it is also possible to restrict the operation of the handle 9 by restricting the displacement of the pinion gear 43 or the racks 44a and 44b in this embodiment.

[0112] This application is based on Japanese Patent Applications Nos. 2024-154968, 2024-154969, 2024-154970, 2024-154971, 2024-154972, and 2024-154973 filed on September 9, 2024, the contents of which are included in this application. Note that the specific embodiments or examples described in the section on the form for carrying out the invention are intended to clarify the technical content of the present invention, and the present invention should not be interpreted narrowly by being limited to only such specific examples.

[0113] According to the heavy door of the present invention, by bringing the door body close to the door frame while maintaining a parallel posture to the door frame, the timing of the abutment between the door body and the door frame can be synchronized, which is useful as it allows the door body and the door frame to be smoothly sealed and operability to be improved.

[0114] DESCRIPTION OF SYMBOLS 1 Heavy door 2 Door body 3 Hinge 4 Door end frame (door frame) 5 Door front frame (door frame) 6 Upper frame (door frame) 7 Lower frame (door frame) 8 Handle 9 Handle 21 Door main body portion 21a Block guide 21c Protrusion portion 22 Cover member 23 Block 23a Female thread portion 24 Handle 25 Door insertion portion 25a Rail 31 Fixed hinge 32 Movable hinge 33 Rotating shaft 34 Hinge side support portion 34a Restricting piece 34b Spring receiving portion 35 Door side support portion 35a Compression portion 36 Guide member 36a Fixed guide 36b Movable guide 37 Guide holding portion 38 Hinge spring 41 Shaft member 42 Shaft holding portion 43 Pinion gear 44a Upper rack (rack) 44b Lower rack (rack) 45a First connecting member (connecting member) 45b Second connecting member (connecting member) 45c First guided portion 45d Second guided portion 45e First roller 45f Second roller 46 Rack guide 46a Rack roller 47 Connecting guide 47a Connecting roller 48 Support member 50 Rod 50a Inclined surface 51 Rod guide 52 Pin support portion 53 Pressing pin 60 Handle regulating portion 61 Regulating member 61a Rotating shaft61b Elongated hole 62 Restricting protrusion 63 Restricted portion 64 Pin holding portion 65 Release pin 65a Tip portion 65b Engaging rod 70 Door restricting portion 71 Shaft portion 72 Restricting member 73 Restricting roller 74 Cushioning member 74a Main body portion 74b Contact portion 74c Compression spring C1 First surface C2 Second surface O1 First virtual center O2 Second virtual center R1 First radius of curvature R2 Second radius of curvature P Gasket W Wall Wa Opening F Reaction force α Angle

Claims

1. A heavy door comprising a door frame provided in an opening formed in a wall, and a door body that can open and close the opening, wherein the door body is displaceable between an open state in which it is away from the opening, a closed state in which it is close to the opening and a gap is formed between the door frame, and a sealed state in which it abuts against the door frame to seal the opening, and further comprising a support structure that displaces the door body between the open state and the closed state, and the support structure is equipped with a sliding displacement mechanism that allows the door body to move towards and away from the door frame between the closed state and the sealed state.

2. The heavy door according to claim 1, further comprising a packing interposed between the door frame and the door body.

3. The heavy door according to claim 2, wherein the support structure comprises a hinge that pivotally displaces the door body between the open state and the closed state, and the sliding displacement mechanism is provided on the hinge.

4. A heavy door as described in claim 2, wherein the support structure comprises a slide support part that slides and displaces the door body in a direction perpendicular to the thickness direction of the door body between the open state and the closed state, and the slide displacement mechanism is provided on the slide support part.

5. A heavy door according to claim 3 or 4, further comprising a pressing means for pressing the door body in a direction from the closed state to the sealed state.

6. A heavy door as described in claim 5, wherein the pressing means comprises a rod that can move forward and backward from the door body and a pressing pin fixed to the door frame, and the rod extends toward the door frame, and an inclined surface formed at the tip of the rod abuts against the pressing pin, thereby pressing the door body in the direction from the closed state to the sealed state.

7. The heavy door according to claim 6, wherein the sliding displacement mechanism is provided with a biasing means for biasing the door body in the direction of the closed state.

8. A heavy door comprising a door frame provided in an opening formed in a wall, and a door body that can open and close the opening, wherein the door body is displaceable between an open state in which it is away from the opening, and a sealed state in which it abuts against the door frame to seal the opening, and further comprising a pressing means that brings the door body into close contact with the door frame, wherein the pressing means has a handle that is rotatable with its axis facing in a direction perpendicular to the door body, a pinion gear that is integral with the rotation axis of the handle, and a rack that is capable of moving back and forth by meshing with the pinion gear, and wherein the door body is pressed against the door frame by displacing the rack through operation of the handle.

9. A heavy door as described in claim 8, wherein the pressing means comprises a rod that can move forward and backward from the door body and a pressing pin fixed to the door frame, and the rod is extended toward the door frame due to displacement of the rack, and an inclined surface formed at the tip of the rod abuts against the pressing pin, thereby pressing the door body in the direction of achieving the sealed state.

10. A heavy door as described in claim 9, wherein the pressure pins are provided on both the left and right sides of the door frame, the rack comprises an upper rack arranged above the pinion gear and a lower rack arranged below the pinion gear, the rod comprises one rod extended by displacement of the upper rack and the other rod extended by displacement of the lower rack, and the one rod and the other rod abut against the left and right pressure pins, respectively.

11. A heavy door as described in claim 10, wherein the pressure pins are provided on the upper and lower sides of both the left and right sides of the door frame, the upper rack and the lower rack are each provided with a connecting member having a longitudinal direction in the vertical direction, the one rod and the other rod are provided on the upper and lower sides of the connecting member, and the one rod and the other rod abut against the upper and lower pressure pins on both the left and right sides.

12. The heavy door according to claim 11, further comprising a guide member for guiding the horizontal displacement of the connecting member.

13. A heavy door as described in claim 12, wherein a roller is provided at the lower end of the connecting member, and the roller is capable of rolling on the upper surface of a support member provided inside the door body.

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